If 5 cats catch 5 mice in 5 minutes, how long will it take one cat to catch a mouse?

Can you find out a way through which you can make five squares out of the given figure by moving just six match sticks?

In the given figure, move three matchsticks so that the resulting figure contains two rectangles.

What is the riddle which can be asked all day with a different correct answer each time.

Christina, Allison and Lena are 3 daughters of John a well-known Mathematician, When I asked John the age of their daughters. He replied "The current age of her daughters is prime. Also, the difference between their ages is also prime."

How old are the daughters?

I have Rs.50 and I spend it in the way as below.

There are 2 cops parked along a one-way street looking for traffic violations. They spot a taxi driver going in the wrong direction, yet they do nothing.

Why?

What 4-letter word can be written forward, backward or upside down, and can still be read from left to right?

There was an aeroplane crash, every single person died, but two people survived. How is this possible?

Seven Robbers robbed a bank and hide the coins in a lonely place.
They decide to divide the money equally the next morning. Two greedy robbers decided to cheat the others and reach the place at night. They equally divided the coins between them, one coin left. So they called another robber and then they decided to divide equally among the three. Sadly again one coin left. The same thing happened to the 4th 5th and the 6th robber.
However, when the 7th robber reached in the morning, they can divide the coins equally.

How many coins were there in total?